Bring her to the range and rent a couple of .380, 9mm and .38's
Whichever caliber she is most accurate with get it. As her skills improve with practice you can add to her inventory or go up in caliber.
FWIW my wife loves her Walther PPS and hates the kick of my PF-9.
CZ 75 P-01 . CZ-75B . CZ 912 . CZ 920 . Glock 26 Gen 3 . Kimber Pro Crimson Carry . XDm 45 3.8 Compact . Ruger 22/45 MKIII